title: Optical near-field-mediated polarization asymmetry induced by two-layer nanostructures.
abstract: We demonstrate that a two-layer shape-engineered nanostructure exhibits asymmetric polarization conversion efficiency thanks to near-field interactions. We present a rigorous theoretical foundation based on an angular-spectrum representation of optical near-fields that takes account of the geometrical features of the proposed device architecture and gives results that agree well with electromagnetic numerical simulations. The principle used here exploits the unique intrinsic optical near-field processes associated with nanostructured matter, while eliminating the need for conventional scanning optical fiber probing tips, paving the way to novel nanophotonic devices and systems.
authors.forename: Makoto
authors.initials: M
authors.lastname: Naruse
authors.forename: Naoya
authors.initials: N
authors.lastname: Tate
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Ohyagi
authors.forename: Morihisa
authors.initials: M
authors.lastname: Hoga
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Hori
authors.forename: Aurélien
authors.initials: A
authors.lastname: Drezet
authors.forename: Serge
authors.initials: S
authors.lastname: Huant
authors.forename: Motoichi
authors.initials: M
authors.lastname: Ohtsu